- Strategy Pattern front: ChannelProviderInterface + 6 providers (yt/dm/tw/pt/od/ru) + factory (ids longs/courts) - ChannelContentService: cache par onglet/tri/recherche (TTL 5min), pagination nextPage - ChannelPage: header (banniere/avatar/subs/description ...plus), tabs dynamiques par capabilities, grilles videos/shorts 9:16/playlists/live, recherche debounced, tri recent/populaire, infinite scroll IntersectionObserver, skeletons/empty/error - Backend: GET /api/channels/:provider/:id/content (videos/shorts/playlists/live) natif par provider